Microwave Peanut Butter Fudge

This Microwave Peanut Butter Fudge is rich, creamy, and made with just three simple ingredients. It has a smooth, melt-in-your-mouth texture and the perfect sweet-and-salty peanut butter flavor. No stovetop, no candy thermometer – just a microwave and a little chill time! It’s the kind of easy no-bake dessert that feels nostalgic, like something grandma used to make. Perfect for the holidays, cookie trays, or gifting to friends and neighbors! If you love classic, chocolatey fudge, too, don’t miss my Original Fantasy Fudge, a tried and true recipe that is always a hit.

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Ingredients & Substitutions

• Butter: Unsalted butter lets you control the salt in the recipe. But, yes, you can use salted butter if that’s what you have. Just expect a slightly saltier flavor.
• Peanut Butter: For the melt-in-your-mouth texture of the fudge, I used creamy peanut butter. It will be melted with the butter. Do not use natural peanut butter.
• Confectioners’ Sugar: Confectioners’ sugar (also called powdered sugar) helps give the fudge its smooth, creamy texture and holds everything together without needing to be cooked. Granulated sugar won’t dissolve the same way and can leave the fudge gritty, so I do not recommend using it for this recipe.

Can I Use Crunchy Peanut Butter In Fudge?

Yes, you can use crunchy peanut butter, but it will add texture with peanut pieces and make the fudge a bit less smooth. If you prefer a creamy, melt-in-your-mouth fudge, stick with creamy peanut butter.

Can I Add Chocolate Chips or Other Mix-Ins?

While I haven’t tested this exact recipe with mix-ins, adding chocolate chips or nuts is usually a great way to customize peanut butter fudge. Just fold them in after mixing the sugar so they’re evenly distributed. Keep in mind that adding mix-ins may slightly change the texture or firmness. For best results, start with small amounts and adjust to your taste!

Can I Make Peanut Butter Fudge Without a Microwave?

Not this recipe. But I have a solution! If you don’t have a microwave, try my other peanut butter fudge recipe that uses the stovetop for melting.

How to Store Microwave Peanut Butter Fudge

Keep your peanut butter fudge fresh by storing it in an airtight container in the refrigerator. It will stay good for up to 2 weeks this way. Before serving, you can let it come to room temperature for a softer texture.

Can I Freeze Peanut Butter Fudge?

Yes! To freeze peanut butter fudge, wrap individual pieces tightly in plastic wrap, then place them in a freezer-safe container or bag. It will keep well for up to 3 months. When ready to enjoy, thaw the fudge in the refrigerator before serving.

5 from 1 vote

Microwave Peanut Butter Fudge

Prep Time 5 minutes mins

Chilling Time 2 hours hrs

Total Time 2 hours hrs 5 minutes mins

This Microwave Peanut Butter Fudge is rich, creamy, and made with just three simple ingredients. It has a smooth, melt-in-your-mouth texture and the perfect sweet-and-salty peanut butter flavor. No stovetop, no candy thermometer–just a microwave and a little chill time!

SaveSaved! Print Rate Comment

Ingredients

• ▢ 1 cup (2 sticks / 227 g) unsalted butter, room temperature
• ▢ 1 cup (258 g) creamy peanut butter
• ▢ 4 cups (500 g) confectioners' sugar

Instructions

• Line an 8×8-inch baking dish with parchment paper, leaving some overhang on the sides for easy removal.
• In a large microwave-safe bowl, combine the butter and peanut butter. Microwave in 30-second intervals, stirring after each, until completely melted and smooth.
• Add the confectioners’ sugar and stir until fully combined. The mixture will be thick.
• Transfer the mixture to the prepared pan. Place a second sheet of parchment paper on top and gently press with your hands to spread the fudge evenly to the edges.
• Remove the top layer of parchment and smooth out the surface if needed.
• Refrigerate for about 2 hours, or until the fudge is set.

Nutrition

Serving: 1piece

Course: Candy, Dessert

Keyword: Microwave Peanut Butter Fudge

Servings: 25 pieces

Author: Amanda Rettke–iambaker.net

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What the Test Kitchen had to say about this recipe:

Autumn

So creamy and rich with just the right balance of sweet and peanut buttery. Super easy to make, too!

Elizabeth

I am not a fan of regular fudge, but I liked this peanut butter fudge a lot! And, even I could make it!

Stephanie

This is perfect for a quick treat. The peanut butter flavor really shines through, which I like.

Bella

I love how smooth this fudge is. It melts in your mouth and isn’t too sweet.